Charging batteries more quickly
How can the capacity of electrochemical storage systems be increased while shortening the charging time at the same time? Using acoustic surface waves, researchers achieved this with lead-sulphuric acid batteries.
|Project status||Project completed|
|Example application areas||Electromobility concepts, Operation of decentralized electrochemical energy storage networks|
|Project duration||October 2012 until March 2016|
A strategic demand for the implementation of electromobility concepts and for the operation of decentralized electrochemical energy storage networks is the increase of capacity of such energy storages, the reduction of charging time and used energy in this process.
The general focus is the systematic investigation of electrochemical reactions in electrochemical energy storages e.g. lead accumulators. Furthermore the influence of kinetic procedures by targeted use of high frequently sound waves, especially surface acoustic waves will be analyzed.
The focus is on the sound waves
Research priority is the targeted irradiation of sound. Mainly surface acoustic waves (SAW) will be implied to influence kinetics of electrochemical processes and therefore accelerate the charging process.
Starting point, reason and target
Starting point: Investigations on targeted irradiation of sound in the boundary layer between electrode and electolyte where most transport limiting processes take place. Results should demonstrate if these processes can be optomized through irradiation of sound.
Reason: Increase of energy storage capacities as well as reduction of charging time or reduction of needed energy in this process. These factors are crucial for the realization of future electromobility concepts and for the use and operation of decentralized electrochemical energy storage networks.
Target: Development of a component for targeted irradiation of sound, tested in real life conditions and implemented in consisting accumulators in cooperation with the cooperation partner Seuffer GmbH & Co. KG. Main target is also the transfer of the acquired knowledge to other electrochemical energy storages.
The project is organized by the following tasks:
- Development of an electrochemical test station with an integrated diagnostic equipment to analyze the acoustic influence of the electrochemical reactions at the electrodes (EVIDA)
- Installation of the EVIDA test station at the institute and cooperation partner Seuffer GmbH & Co. KG
- Implementing the diagnostic equipment to the EVIDA test station
- Analysis of the acoustic irradiation by hydrophone
- Measurement and characterization of the charging performance parameters
- Recording of specific UI characteristic curve by using different transducers
- Transfer of results to real accumulators
The use of innovative analytical methods like scanning vibrometry, impendance spectroscopy and the integration of sensor surveillance systems to monitor and measure the transport limiting processes during charging and discharging of the accumulator.